114 CASSIN'S MONOGRAPH OF THE GENERA 



(A.) The species of this genus which I have seen are as follows : 

 1. Hydropsalis torquatus. (Gm.) 



Caprimulgus torquatus. Gmelin, Syst. Nat. i. part ii. p. 1032, 



Caprimulgus hrasiliensis. Brisson, Orn. ii. p. 481. 



Caprimulgus furcifer. Vieillot, Nouv. Diet. x. p. 242. 



" Caprimulgus psalurus. Azara," Temm. PI. col. ii. p. (27 liv.) pi. 157, 158. 



" Caprimulgus Jissicaudus. Merrem." Gray Cat. Fissi. Brit. Mus. p. 10. 



" Caprimulgus grandis. Linn. Gm." Lichtenstein Verzeichness, p. 58. 



Hydropsalis Azarce. Wagler, Isis 1832, p. 1222, 



Psalurus macropterus. Swainson, Cab. Cy. Birds ii. p. 339. 



Caprimulgus manurus. Vieill. Nouv. Diet. x. p, 239, (1817.)? 



PL 13. (Section of tail feathers.) 



Form. — 6 Two external feathers of the tail longest, the next in length are the two 

 central feathers, intermediate feathers graduated, wings rather strong, quills curved, 

 second primary longest, head and general form of the body broad and strong. 



Dimensions. — Total length of skin from tip of bill to end of longest tail feathers 

 about 20 inches; wing 7| ; tail to end of external tail feathers 15| inches. 



Colors. — Neck encircled with a ring of dull orange yellow. Entire plumage 

 above gray, every feather longitudinally striped with black, and more or less 

 transversely striped and mottled with lines and spots of black and white, the latter 

 color predominating on the rump, upper tail coverts and ends of secondary quills. 

 Wing coverts brownish black, conspicuously marked with rounded white spots at 

 their tips. Under parts dull white, with transverse lines of brownish black nearly 

 obsolete on the under tail coverts. External tail feathers with their tips and with 

 the edges of both webs approaching their tips, silky white, more extended upwards 

 on the inner web, and which is also the color of a large terminal portion of the next 

 three feathers, the basal portion and the greater part of the external feathers being 

 brownish black, banded transversely with dull white ; central feathers gray, with 

 irregular bands of brownish black, and more or less lined and mottled with the same 

 color. 



? Very similar to the male, but with the external tail feathers little longer than 

 the second. Tail almost entirely gray and black, with little or no white. 

 Hah. — South America. 



Ohs. — ^This handsome and common species has been repeatedly re-described and 

 otherwise mistaken by naturalists. Its many synonymes I have endeavored to 

 reconcile somewhat in detail, in the Proceedings of this Academy, Vol. V. p, 176, 

 April, 1851. 



